For the seven 220 V/0.5 A outputs you don't even need relays. Since the current is only going to be about 0.5 A, a MOSFET rated for 250 V would suffice...
MOSFETs don't work with AC. (You could do it with a pair of complementary MOSFETs on each output, but would get "messy".) Plus, he needs some "safety" isolation between the 220V and the Arduino.